I heard on an episode of Frasier and also by some British people at a conference.
Usage: That's a nice segue for Adam to his next topic - financials.
It means a diversion during a conversation... moving to another topic... etc.
It is pronounced as "segway", which threw me offtrack. I looked around on the net for it and all i found was a scooter for people to stand on and drift around.
The case cracked when i googled upon...
http://www.word-detective.com/120398.html